Mold for the manufacture of concrete blocks.



T. CORNUELLE. 'MOLD on THE MANUFACTURE OF CONCRETE BLOCKS.

Patented July 17,1917.

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THEODORE CORNUELLE, OF CINCINNATI, OHIO.

MOLD FOR, THE MANUFACTURE OF CONCRETE BLOCKS.

Specification of Letters Patent.

Patented July 17,-l9l'7.

Application fi1ed January 21, 1916. Serial No. 73,444.

To all whom it may concern:

Be it known that I, THEODORE Comvimrnn, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Molds for theManufacture of Concrete Blocks, of which the following is aspecification.

This invention relates to molds, or forms, for the manufacture ofconcrete blocks.

The object of the invention is to provide a mold which is constructedpreferably of metal and one which may be easily assembled and knockeddown.

Another object of my invention is to produce a mold which may beemployed for the manufacture of concrete blocks of the ordinaryconstruction as well as blocks molded in pairs and adapted to beseparated by fracturing, in which case the molds may be built one uponanother.

Concrete blocks, as is well known, are constructed in numerous ways toimitate stone, especially is it desirable to so construct the face ofblock so that it will resemble a fractured stone face. It is one of theobjects of this invention to provide a mold whereby blocks may be madeof concrete, the concrete being poured into the mold, and aftertheconcrete has settled and dried out sufiiciently the mold removed fromthe molded block, allowing part of the mold to remain embedded in theblock, whereby the block can be fractured by that part of the mold leftin the block, enabling the manufacture of blocks with fractured faces,no two being exactly alike, and producing an excellent representation ofa fractured stone face.

The invention consists of the certain parts, combination of parts anddetails of construction as will be described in the followingspecification and pointed out in the appended claims.

In the drawings which serve to illustrate my invention and which show apreferred construction Figure 1 is a side elevation of a moldconstructed in accordance with my invention.

Fig. 2 is a plan view of a portion of the mold in which a single blockis molded.

Fig. 3 is a plan view of a portion of the mold adapted to mold a twinblock, or in other words, a block which is to be co nstructed with afractured face. 7

Fig. 4: is a perspective view of one of the side core plates employed.

Fig. 5 is a perspective view of one of the end plates.

Fig. 6 is an elevation of a portion of the core plate, showing the edgeof the resilient or yielding core.

Fig. 7 is a perspective view of one of the yielding sides of the core.

Fig. 8 is a cross section taken through the core plate and core showingthe means for collapsing, to a certain degree, the core.

Fig. 9 is a cross section of a section of the mold showing a twin blockmolded therein.

Fig. 10 is a perspective view of one of the side core plates used on topwhen a twin block is to be constructed and fractured showing the wedgesin places.

Fig. 11 is a cross section of a twin block before fracturing.

Fig. 12 is a cross section of a block after fracturing showing thepitching tool in position for finishing the block face.

Fig. 13 is a perspective view of the means for clamping and locking theupper and lower core plates together and also for look ing the coreplates and end plates together.

Fig. 14c is a perspective view of one of the end plates showing the coremounted thereon for providing a hand hole in the block.

Referring more particularly to the drawlngs:

1 illustrates the floor upon which the molds are placed. This floor maybe that of a carfor conveying the mold under a concrete hopper. Themolds are placed up against an end plate at one end and similar meansmay be provided at the other end if desired. The core plates 3 areprovided at their ends with a T flange 4: constructed in any suitablemanner, as for instance by riveting theextra member a on the endsthereof. These T flanges extend into the on the abutting end plates arethen clamped together by means of the clamping strip 11 which isprovided with suitable slots 12 and 13 for interlocking engagement withthe subsidiary flanges 10 of the flanges 9. Thus the molds are clamped'and held together.

Each core plate 3 is provided with a male and female coreextension. Thefemale part of the cores are represented at 13 and are riveted to theside plates 3. There are four of these core extensions for each core andeach is slightly curved at its edges so that they overlap each other andprovide means for yielding inwardly, slightly, or in other words,collapsing slightly to render it easy for them to be removed from theconcrete block after it is molded, and is best shown in Figs. 6 and 7.To insure the collapsing of these cores, I provide steel angular springs14 which extend inwardly from the sides of the cores, and are held Lmdertension bya ring 15 around the ends of the angular extensions 16 on thesprings.

Opposite and on the same core plate, but extending the oppositedirection, of the female core, I provide the male core made up ofangular plates 17 preferably punched out of the core plate 3 andthenbent at right angles 7 thereto. The plates 17 incline slightly towardthe center and are adapted to fit into the end of the female core andspread same apart to the natural size of v the core and hold same thereuntil the mold is knocked down at which time the springs 14 pull thecore away from the concrete and allow the cores to be easily removed.

Inasmuch as asmall percentage of frac tured blocks are required incomparison to the smooth sided blocks, any desired number of moldsmay bebuilt up as shown in Fig. 1 for the fractured blocks.

The side core plates 3 are provided for molding the top part ofthefractured blocks and are provided with flanges 20 at the bot tom edges,Fig. 10. The flanges have square holes therein for the insertion ofwedges 21' which are adapted to extend inside of the mold and becomeembedded in 1 wedges 21.

The side core plates 3 are constructed as shown in Fig. 10 and have anadditional flange 23 fastened to the T flange at or, if

desired, the flange 4L may be constructed as an L instead of a T. Thenthe clamping bar 11 may interlock therewith the same as with the lowerseries, the same locking bar interlocking both the top and bottom molds.

The end plates 6 are provided with hand hole cores 30 (Fig. 14:) toprovide for the easy handling of the blocks after they are molded.

When the concrete is poured into the molds and allowed to dry a givenlength of time, the wedges 21 are tapped thereby fracturing the blockalong the dotted line shown in Fig. 11. Then after the block isfractured, the shoulder 25 left thereon by means of the flanges 20 ispitched off with a pitching tool 26 as shown in Fig. 12 which pitchingoperation removes all trace of the imprint of the wedges and produces aface the exact representation of fractured stone.

.The ends 6 of the molds may be further reinforced by wooden lockingbraces.

Modifications of my invention might be made without departing from itsspirit and scope, but I do not wish to be confined to the exact detailsshown.

WVhat I claim as new and desire to secure by Letters Patent is:

1. In a mold for making concrete blocks, the combination with a floorand end plates, of side plates, flanges projecting from one side of saidside plates and a core projecting from the other side thereof whereby aseries of side plates when in position will assemble the cores of aseries of molds, said cores and flanges interconnecting respectivelywith the flanges and core of each succeeding side plate.

2. In a mold for making concrete blocks, the combination with a floorand end plates, of side plates having openings therethrough, each sideplate having a core projecting therefrom on one side and around saidopening, and flanges extending from the opposite side thereof aroundsaid opening, whereby a series. of side plates will form a series ofmolds and cores therefor and provide a uniform opening through the coresof all the molds in the series.

3. I11 a mold for making concrete blocks, the combination with a framein which the concrete ismolded to its desired shape, said framecomprising a lower section, an upper section, and wedges insertedtherebetween and extending a short distance inside of said frame so asto become embedded in the block a short distance, whereby the block maybe broken in halves by operating the wedges after the block has beenmolded and allowed to settle.

4. In a mold for making concrete blocks, the combination with a frame inwhich the concrete is molded to its desired shape, said frame comprisinga lower section and an upper section, a flat frame therebetween, a

messes series of wedges inserted in said flat frame and extending ashort distance inside thereof, so as to become embedded in the concretea short distance, and whereby the block may be broken in halves byoperating the wedges after the block has been molded and allowed tosettle.

5. In a mold for making concrete blocks, the combination with a frame inwhich the concrete is molded to its desired shape, said frame comprisinga lower section having longitudinal parallel end bases, a series ofpartitions therebetween, thereby providing a series of rectangularcells, an upper section similar in construction, the cells of each beingin vertical alinement, a molding around the said cells and insertedbetween the upper and lower sections, and a series of wedges in saidmolding extending inside of the cells a short distance, so as to becomeembedded in the concrete and whereby the block is broken when the wedgesare operated after the block has been molded and allowed to settle.

6. In a mold for the manufacture of concrete blocks, a floor, an upperand lower section for molding the blocks in pairs, upper and lower sidecore plates, upper and lower end plates, the upper plates having aflange around the bottom having apertures therein, wedges in saidapertures and extending into the mold a short distance so as to bemolded into the concrete block, and an inters locking bar for holdingthe various upper and lower plates in register with one another.

7 The combination in a mold, of a side having a hole therein, inturnedflanges formed at the edges of the hole, a core engaging said fianges,and ends detachably connected with the side.

THEODORE CORNUELLE.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. G.

